When you have decided to buy test tubes to equip a laboratory, whether it be a small home lab, a high school biology lab or an elaborate, very sophisticated university or corporate laboratory, here are some important considerations to make note of to ensure that the best decisions are made concerning practical use and budget. 

"Buy Test Tubes"When it comes time to buy test tubes are they going to be used just to hold and secure specimens to be placed on a slide and examined under a microscope? Will any of the contents be heated at high temperatures, or promote corrosion within the test tubes? What about an identification system? What colored test tubes be helpful, or too likely shield the contents from view? What about cost? Plastic test tubes are the least expensive, but are there restrictions in their use? 

The majority of test tubes are basically used to hold and secure your specimens for examination under a microscope, or content that are noncorrosive to be mixed with other such content. For such applications the least expensive glass or plastic test tubes are quite adequate. Plastic test tubes are particularly susceptible to corrosion though, and should not be used to contain any corrosive substance, or where such a mixture would promote corrosion. 

A glass test tube is much more suitable for that purpose; specifically, Pyrex test tubes, which are specifically manufactured to resist corrosion, and to minimize expansion due to high heat, making breakage much less likely.

 When you buy test tubes future identification of the contents might be the last thing on your mind, but it should be one of the first because how many considerations are much more important than knowing exactly what is inside each test tube? Colored test tubes can make identification particularly easy, and so not a primary concern at some personality to the lab. The tint is usually transparent up that the contents can be easily viewed.